Shoe for disk harrows



,July 3, 1923. C. M. JACOBS SHOE FOR DISK HARRows Filed May 26. 1922 6.11.7'. Jacos Patented; July s, 1923.

intenser narran sraras earner orties.'v

CLARENCE M. JACOBS, OF BUTLER,'KE1\TTUCKY.

SHOE vFR DISK HARROWS.

Application filed May 26, 1922. Serial No. 563,860.

T 0 all whom it may concern.:

Be it known that CLARENCE M. JACOBS, a citizen of the United States, residing at Butler, in the county of Pendleton and State of Kentucky, has invented certain newand` useful Improvements in Shoes for Disk has means whereby the double-tree may be connected with the front clevis at different elevations, which will effect the rolling action of the shoe, to a considerable extent.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same.

F ig. 1 is a side elevation of a device embodying my invention, and,

l? ig. 2 is a perspective view of the same.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment o-f my invention, the numeral 5 designates the tongue of a disk harrow. This tongue is connected with the usual frame 6, carrying the disks 7, as shown.

My device embodies ay rear clevis 8, which is formed from a single piece of metal, bent to provide a vertical sleeve 9, which is cylindrical, and a U-shaped socket 10, connected therewith by intermediate necks 11. The U-shaped socket receives the forward end of the tongue 10, and is rigidly secured thereto, by bolts 12 or the like.

The numeral 13 designates a vertical shaft, slidably mounted within the sleeve 9, and having a. shoe 14 rigidly secured toits lower end. This shoe is relatively wide and is longitudinally curved, the curva-ture gradually increasing toward the forward end thereof. The shoe 14 also tapers toward its forward upper end. Y

The numeral l5 designates a front clevis,

Aears 17. ,y

In the use of the device, the' harrowis embodying an elongated vertical plate 16, having a pair of spaced strap ears 17 formed integral therewith. These strap ears surround the shaft 13 above and below the sleeve 9, and are ladapted to be contracted to have clamping engagement .with the shaft 13, by means of bolts 18. Y

The plate 16 has,verticallyy spaced openings 19, formed therein, to receive the clevis ofthe double tree, whereby such doubletree may be` connected withthe front clevis` at different elevations. This is important, as

by lowering the connection the pull by the draft animals will tend to throw the rear portion of the shoe 14 into action. The rolling or sliding action ofthe shoe is therefore regulated, to some extent. It is obvious that the shaft 13, and shoe 141 are freeto turn lat-.

erally in steering, and the shaft`13 is also vertically adjustable within the strap drawn forwardly over the ground, in the usual manner-` The shoev slides uponthe ground, and thus takes place of the usual wheeled truck. Attention is called to thefact that the bolts 1S may be so adjusted thatvthe vertical shaft 13 will be fiictionally held wit-hin'the Astrap ears against turning movement underA ordinary working conditions, kbut should the shoe 14 encounter an unusual obstacle such as a large stone, the shaft 13 could then turn Vwithin the strap ears 17, topermit of ,thelateral movement of the shoe 14. The shock would be absorbed vby the frictiona-l` engagement between the elements 13and 17, to permit of the lateral movement. shoe 14 would subsequently return to the The*l neutral position, upon the `continued operat-ion of the machine, or may be returned thereto by the operator. It will also be seen that the higher the draft line is placed l on the plate or clevis 16, the'less vertical component and the greater tendency of sinking of the blade 1li-lk into the soil and therefore a greater need for the sharp curvature of the shoe 14, and the increasing in width of the same rearwardly. i

It is to be understood that the form my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the size,

shape, and arrangement of parts may be resorted to without departing from the spirit of my invention or the scope of the subjoined claims.

Having thus described my invention, l. claim:

l. The rear clevis having a socket to be secured to the tongue of a disk harrow or the. like, said rear clevis embodying a substantially vertical sleeve, a` substantially vertical shaft pivotally mounted within the sleeve, a ground engaging slice carried by the lower end of the shaft and being longitudinally curved and increasing in curvature forwardly, a front clevis embodying a substantially vertical plate having a pair of strap ears receiving the shaft above and below the rear clevis, said substantially vertical plate having vertically spaced means for connection with a. draft appliance which may be attached to the plate at different elevations, and means for effecting a clamping engagement between the strap ears and the substantially vertical shaft whereby the shaft is held against turning movement under ordinary working conditions and may turn when the shoe is subjected to an abnormal forc-e tending to shift it laterally,

2. The rear c-levis to be secured to the tongue of a disk harrow or the like and having substantially vertical sleeve, a substantially vertical shaft, held within the sleeve, a longitudinally curved ground shoe carried by the lower `end of the shaft, a front clevis embodying an ear receiving the shaft, and means to clamp said ear to the shaft in the manner whereby the shaft is held against turning movement within the ear under normal working conditions and may turn therein when the shoe is subjected to an abnormal force tending to shift it laterally.

incense 3. A clevis device to be secured to the tongue of a disk harrow or like implement embodying a substantially vertical, ear, av

substantially vertical shaft mounted within the ear, a ground engagin shoe secured to the lower end of the shaft and extending longitudinally beyond said substantially vertical shaft, and means for clamping said ear to the shaft so that said shaft is held against turning movement under normal working conditions and may turn when an abnormal force is applied to said shoe tending to shift the shoe laterally. Y y

el. fr clevis device adapted for connection to the tongue of a disk ha-rrow or like implement, embodying substantially vertical plate having vertical spaced means whereby a draft appliance may be attached to the plate at different elevations, a substantially vertical shaft secured to the clevis device, and a ground engaging shoe secured to the lower end of the shaft and being longi` tudinally curved and increasing in curvature forwardly and upwardly. y A, y 5. A clevis device adapted for connection to the tongue of a disk harrow or likel implement, embodying substantially vertical plate having vertical spaced means whereby a draft appliance may be attached to the plate at different elevations, a substantially vertical shaft secured to the clevis device, and a ground engaging shoe secured tol'the lower end of the shaft and being longitudinally curved and increasing 4in curvature forwardly and upwardly, said shoe also tapering forwardly. y y u y ln testimony whereof l aliX my signature.

his CLARENCE M. JACOBS.

marl: fitness J. A. LAWRENCE. 

